论文标题
银河系子结构对暗物质本质的含义
Implications of Milky Way Substructures for the Nature of Dark Matter
论文作者
论文摘要
我们研究了如何使用最近的出色流研究来研究以银色的间接观察，这转化为不同暗物质模型的限制。特别是，我们在质量范围内使用测量的深色Subhalos数量$ 10^7-10^9 \，{\ rm m _ {\ odot}} $与冷暗物质方案相比，约束Subhalo质量功能的修改。我们获得了下限$ M _ {\ rm WDM}> 3.2 \，{\ rm kev} $和$ m _ {\ rm fdm}> 5.2 \ times 10^{ - 21} \，{\ rm rm ev} $在温暖的深色物质和fuzzy的深色质量上，{\ rm ev} $。当暗物质耦合到深色辐射浴时，我们发现动力学的去耦必须在高于$ t _ {\ rm kd}> 0.7 \，{\ rm kev} $的温度下进行。我们还讨论了恒星流观测的未来前景。
We study how the indirect observation of dark matter substructures in the Milky Way, using recent stellar stream studies, translates into constraints for different dark matter models. Particularly, we use the measured number of dark subhalos in the mass range $10^7-10^9\,{\rm M_{\odot}}$ to constrain modifications of the subhalo mass function compared to the cold dark matter scenario. We obtain the lower bounds $m_{\rm WDM} > 3.2\,{\rm keV}$ and $m_{\rm FDM} > 5.2\times 10^{-21}\,{\rm eV}$ on the warm dark matter and fuzzy dark matter particle mass, respectively. When dark matter is coupled to a dark radiation bath, we find that kinetic decoupling must take place at temperatures higher than $T_{\rm kd} > 0.7\,{\rm keV}$. We also discuss future prospects of stellar stream observations.
